Metallic lathing



Nov. 26, 1929. F. M. BARTON METALLIC LATHING Filed Oct. 21, 1926 Patented Nov. 26, 1929 UNITED STATES PATENT- GF'FIfiE FRANCIS M. BARTON, F GHICAGO, ILLINOIS, 'ASSIGN O R T'O BAR'IFO N WEB SYSTEM, OF GHIGAGO, ILLINOIS, A CORPORATION ILLINOIS YME'IALLIC na'r'nme Application filed October 21, 1926. Serial No. 143,063.

The invention relates to metallic lathing. One object of the invention is to provide an improved lath formed of a metal sheet which is continuously corrugated, so that the sheet as a whole will possess the strength of a uniformly corrugated sheet with integral plaster retaining tongues disposed in the grooves on the outer face of the sheet. Other objects of the invention will appear from the detailed description.

The invention consists in the several novel features hereinafter set forth and more particularly defined by the claim at the conclusion hereof.

In the drawing: Fig. 1 is a perspective of a portion of a sheet of lath embodying the invention. Fig. 2 is a section, showing the lap between two sheets of lath. Fig. 3 is a plan of the lath, the back face being shown.

Fig. 4 is a section on an enlarged scale, showing the plaster on the lath.

The invention is exemplified in a sheet of metal 5 which is corrugated throughout its entire area. The corrugations extend from end to end of the sheet. The latter may be of any desired size. The sheet comprises a series of curved crown portions 6 at the outer face of the sheet which are united by a series of reversely curved crown portions 7 at the inner face of the sheet. The portions between the outer portions of the crowns. 6 consist of portions 8 and 9 which extend transversely to the plane of the sheet to form a parallel series of outwardly flared grooves 10 on the outer face of the sheet and alternating series of similar oppositely flared grooves 11 on the inner face of the sheet. The side portions. 8 are cut, as at 12, to leave integral out-struck tongues 13 which are bent transversely into the grooves 10 to form plaster retaining claws. The side portions 9 are similarly cut to form tongues 14 which are also bent away from said sides and into the grooves 10 to form plaster retaining claws. The tongues 13 are formed at points which are staggered or out of line with the tongues 14: on the opposed side portion 9, so that each tongue will be disposed opposite an imperforate portion 15 of the opposite side of each groove 10. Tongues 13 and 14 are bent and curved to of metal at the outer portions of the crowns 1 6 and 7 which will give to the sheet the de sired rigidity and strength, notwithstanding the cutaway portions. In practice, one margin of the sheet is left uncut, as at 20, and

without tongues, so that it may be lapped by the margin of another sheet. Any suitable means may be used to secure the sheet in place.

The invention exemplifies a metallic lath which is formed of a sheet of metal which is corrugated throughout its entire area to render it of unusual stiffness and strength so that this metal will suffice. The lath is especially advantageous in ceillings on the underside of concrete floors, as well as in other places where the load of the plaster is suspended from the lath.

When so used, it provides a structure in which the crown portions 6 will be under tension and the crown portions 7 will be under compression. The tongues 13 are curled sufficiently to form effective keys for the plaster and the openings 16 permit the plaster to pass in back of the crowns 6 and the sides 8 and 9. The outer ends of the claws or tongues 13 and 14 are substantially coincident with the plane of the outer crowns 6 or slightly inside of it, so that the tongues will not interfere with the application-of the plaster to the sheet, such as occurs when the retaining tongues project from the plane of the outer face of the sheet.

The invention is not to be understood as restricted to the details set forth, since these may be modified within the scope of the appended claim, without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is:

A metallic lath consisting of a sheet of metal having a Substantially continuous series of parallel corrugations extending across it and comprising alternating series of crowns at opposite faces of the sheet and side portions extending transversely between the crowns, and tongues struck wholly from the side portions, said tongues being connected at one end thereof to the sheet adjacent one series of crowns and having their other ends bent into the grooves between the other series of crowns and terminatinginwardly of and adjacent the planecof said other series of crowns, both series of crowns being imperforate and continuous.

Signed at Chicago, Illinois, this 10th day i of May, 1926.

FRANCIS M. BARTON. 

